📌Overview

Purpose: To provide a Model Context Protocol (MCP) server that enables the visualization of data using Vega-Lite syntax for large language models (LLMs).

Overview: The Data Visualization MCP Server is designed to facilitate data management and visualization, allowing users to save data tables and generate visual representations in a straightforward manner using Vega-Lite specifications.

Key Features:

• Data Saving Tool (save_data): This tool allows users to save data tables for later use in visualizations. It stores the data with a specific name and provides confirmation upon successful saving.

• Data Visualization Tool (visualize_data): This feature enables the visualization of saved data tables based on Vega-Lite specifications. It can output the results in either a textual format containing the Vega-Lite specification or as a base64 encoded PNG image of the visualization, catering to different user needs.

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Data Visualization MCP Server

Overview

A Model Context Protocol (MCP) server implementation that provides an interface for visualizing data using Vega-Lite syntax.

Components

Tools

The server offers two core tools:

• save_data
  Saves a table of data aggregations to the server for later visualization.
  Input:

  • name (string): Name of the data table to be saved
  • data (array): Array of objects representing the data table
    Returns: success message.

• visualize_data
  Visualizes a table of data using Vega-Lite syntax.
  Input:

  • data_name (string): Name of the data table to be visualized
  • vegalite_specification (string): JSON string representing the Vega-Lite specification
    Returns:
  • If --output_type is set to text: success message with an artifact key containing the complete Vega-Lite specification including data.
  • If --output_type is set to png: base64 encoded PNG image of the visualization using the MPC ImageContent container.

Usage with Claude Desktop

# Add the server to your claude_desktop_config.json
{
  "mcpServers": {
    "datavis": {
        "command": "uv",
        "args": [
            "--directory",
            "/absolute/path/to/mcp-datavis-server",
            "run",
            "mcp_server_datavis",
            "--output_type",
            "png"  # or "text"
        ]
    }
  }
}